Flat Spring Washer: 1.Standard:GB,DIN,ANSI 2.Surface:black,zinc plated,colorful 3.Competitive price 4.Excellent quality Flat Spring Washer: Material: Carbon and stainless steel Outside diameter: From. 187" (4.75mm) to 4.47" (113mm) Fit bolt or rod diameters from. 093" (2.3mm) to 2" (50.8mm) Loads: From 5.7lbs (25.4N) to 4612lbs (20514N0). flat spring washer